CN111306294A - Fault diagnosis method and device for rotation speed sensor, electronic equipment and storage medium - Google Patents
Fault diagnosis method and device for rotation speed sensor, electronic equipment and storage medium Download PDFInfo
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- CN111306294A CN111306294A CN201911217209.2A CN201911217209A CN111306294A CN 111306294 A CN111306294 A CN 111306294A CN 201911217209 A CN201911217209 A CN 201911217209A CN 111306294 A CN111306294 A CN 111306294A
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16H—GEARING
- F16H61/00—Control functions within control units of change-speed- or reversing-gearings for conveying rotary motion ; Control of exclusively fluid gearing, friction gearing, gearings with endless flexible members or other particular types of gearing
- F16H61/12—Detecting malfunction or potential malfunction, e.g. fail safe; Circumventing or fixing failures
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16H—GEARING
- F16H61/00—Control functions within control units of change-speed- or reversing-gearings for conveying rotary motion ; Control of exclusively fluid gearing, friction gearing, gearings with endless flexible members or other particular types of gearing
- F16H61/12—Detecting malfunction or potential malfunction, e.g. fail safe; Circumventing or fixing failures
- F16H2061/1208—Detecting malfunction or potential malfunction, e.g. fail safe; Circumventing or fixing failures with diagnostic check cycles; Monitoring of failures
- F16H2061/1216—Display or indication of detected failures
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16H—GEARING
- F16H61/00—Control functions within control units of change-speed- or reversing-gearings for conveying rotary motion ; Control of exclusively fluid gearing, friction gearing, gearings with endless flexible members or other particular types of gearing
- F16H61/12—Detecting malfunction or potential malfunction, e.g. fail safe; Circumventing or fixing failures
- F16H2061/1256—Detecting malfunction or potential malfunction, e.g. fail safe; Circumventing or fixing failures characterised by the parts or units where malfunctioning was assumed or detected
- F16H2061/1284—Detecting malfunction or potential malfunction, e.g. fail safe; Circumventing or fixing failures characterised by the parts or units where malfunctioning was assumed or detected the failing part is a sensor
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Abstract
The invention relates to the technical field of double-clutch transmission fault detection, in particular to a fault diagnosis method and device for a rotating speed sensor, electronic equipment and a storage medium. The method comprises the following steps: detecting the rotation speed of an inner input shaft and the rotation speed of an output shaft; judging whether the rotating speed of the inner input shaft is greater than a first preset rotating speed or not; when the rotating speed of the inner input shaft is greater than a first preset rotating speed, acquiring a correcting rotating speed of the inner input shaft according to the rotating speed of the output shaft, and taking the correcting rotating speed of the inner input shaft as the rotating speed of the current inner input shaft; and when the rotating speed of the inner input shaft is continuously greater than the first preset rotating speed and continues for a first diagnosis time, determining that the rotating speed sensor is invalid. The invention monitors the abnormal duration and the occurrence frequency of the internal input shaft speed sensor, adopts the substitute value for control, can detect the failure before the torque is transmitted, and avoids the fault false alarm.
Description
Technical Field
The invention relates to the technical field of double-clutch transmission fault detection, in particular to a fault diagnosis method and device for a rotating speed sensor, electronic equipment and a storage medium.
Background
The transmission is typically torque transfer controlled by sensing actual internal input shaft speed via an internal input shaft sensor. However, the rotation speed sensor has signal deviation under the condition that the rotation speed sensor has no electrical fault; the signal deviation is influenced by temperature and environment, and the signal deviation of different sensors is different; the signal deviation and the change thereof cause the fluctuation of the rotating speed in the control process, and the control is inaccurate.
At present, the rotating speed of an internal input shaft is generally monitored when a clutch transmits torque, and when the rotating speed sensor of the internal input shaft generates instantaneous fluctuation due to self characteristics, fault and misinformation can occur, and the corresponding clutch is opened. And at the moment, the user can only limp, so that the driving experience of the user is adversely affected.
Disclosure of Invention
The invention mainly aims to provide a fault diagnosis method for a rotating speed sensor, and aims to improve the accuracy of fault diagnosis of the rotating speed sensor.
In order to achieve the above object, the present invention provides a method for diagnosing a malfunction of a rotational speed sensor, the method comprising:
detecting the rotation speed of an inner input shaft and the rotation speed of an output shaft;
judging whether the rotating speed of the inner input shaft is greater than a first preset rotating speed or not;
when the rotating speed of the inner input shaft is greater than a first preset rotating speed, acquiring a correcting rotating speed of the inner input shaft according to the rotating speed of the output shaft, and taking the correcting rotating speed of the inner input shaft as the rotating speed of the current inner input shaft;
and when the rotating speed of the inner input shaft is continuously greater than the first preset rotating speed and continues for a first diagnosis time, determining that the rotating speed sensor is invalid.
Preferably, after the step of obtaining the corrected rotation speed of the inner input shaft according to the rotation speed of the output shaft when the rotation speed of the inner input shaft is greater than a first preset rotation speed, and using the corrected rotation speed of the inner input shaft as the current rotation speed of the inner input shaft, the method further includes:
and judging that the rotating speed sensor is invalid when the number of times that the rotating speed of the inner input shaft is greater than the first preset rotating speed is greater than the preset number within second diagnosis time.
Preferably, the second diagnostic time is less than the first diagnostic time.
Preferably, after the step of determining that the rotation speed sensor is failed, the method further includes:
and controlling the corresponding clutch to be opened so as to enable the vehicle to enter a limp home mode.
Preferably, the step of detecting the internal input shaft rotation speed and the output shaft rotation speed specifically includes:
detecting a working voltage value of an inner input shaft rotating speed sensor, and obtaining the rotating speed of the inner input shaft according to the working voltage value;
the output shaft rotation speed is detected.
Preferably, the step of obtaining the corrected rotation speed of the inner input shaft according to the rotation speed of the output shaft and taking the corrected rotation speed of the inner input shaft as the current rotation speed of the inner input shaft specifically includes:
and acquiring the corrected rotating speed of the inner input shaft according to the rotating speed and the transmission ratio of the output shaft, and taking the corrected rotating speed of the inner input shaft as the current rotating speed of the inner input shaft.
Preferably, after the step of detecting an operating voltage value of an inner input shaft rotation speed sensor and obtaining the inner input shaft rotation speed according to the operating voltage value, the method further includes:
and when the working voltage value is larger than or equal to a first preset voltage value, judging that the rotating speed sensor fails, and controlling the corresponding clutch to be opened so as to enable the vehicle to enter a limp home mode.
Further, to achieve the above object, the present invention also proposes a rotational speed sensor failure diagnosis apparatus comprising:
a detection module: for detecting the speed of the inner input shaft and the speed of the output shaft;
a judging module: the device is used for judging whether the rotating speed of the inner input shaft is greater than a first preset rotating speed or not;
a control module: the inner input shaft correcting rotating speed is obtained according to the rotating speed of the output shaft when the rotating speed of the inner input shaft is greater than a first preset rotating speed, and the inner input shaft correcting rotating speed is used as the current rotating speed of the inner input shaft;
a diagnostic module: and the control unit is further used for judging that the rotating speed sensor is invalid when the rotating speed of the inner input shaft is continuously greater than the first preset rotating speed for a first diagnosis time.
In addition, to achieve the above object, the present invention also provides an electronic device, including: the system comprises a memory, a processor and a rotating speed sensor fault diagnosis program stored on the memory and capable of running on the processor, wherein the rotating speed sensor fault diagnosis program is configured to realize the steps of the rotating speed sensor fault diagnosis method.
In addition, in order to achieve the above object, the present invention further provides a storage medium having a rotational speed sensor fault diagnosis program stored thereon, wherein the rotational speed sensor fault diagnosis program, when executed by a processor, implements the steps of the rotational speed sensor fault diagnosis method as described above.
The invention detects the rotating speed of the inner input shaft and the rotating speed of the output shaft; judging whether the rotating speed of the inner input shaft is greater than a first preset rotating speed or not; when the rotating speed of the inner input shaft is greater than a first preset rotating speed, acquiring a correcting rotating speed of the inner input shaft according to the rotating speed of the output shaft, and taking the correcting rotating speed of the inner input shaft as the rotating speed of the current inner input shaft; and when the rotating speed of the inner input shaft is continuously greater than the first preset rotating speed and continues for a first diagnosis time, judging that the rotating speed sensor is invalid, and realizing fault diagnosis of the rotating speed sensor. The invention monitors the abnormal duration and the occurrence frequency of the internal input shaft speed sensor, adopts the substitute value for control, can detect the failure before the torque is transmitted, and avoids the fault false alarm.
Drawings
Fig. 1 is a schematic structural diagram of an electronic device in a hardware operating environment according to an embodiment of the present invention;
FIG. 2 is a schematic flow chart illustrating a method for diagnosing a fault of a rotational speed sensor according to a first embodiment of the present invention;
FIG. 3 is a flowchart illustrating a method for diagnosing a fault of a rotational speed sensor according to a second embodiment of the present invention;
FIG. 4 is a flowchart illustrating a method for diagnosing a fault of a rotational speed sensor according to a third embodiment of the present invention;
fig. 5 is a block diagram showing the configuration of the first embodiment of the rotational speed sensor failure diagnosis apparatus of the present invention.
The implementation, functional features and advantages of the objects of the present invention will be further explained with reference to the accompanying drawings.
Detailed Description
It should be understood that the specific embodiments described herein are merely illustrative of the invention and are not intended to limit the invention.
Referring to fig. 1, fig. 1 is a schematic structural diagram of an electronic device in a hardware operating environment according to an embodiment of the present invention.
As shown in fig. 1, the electronic device may include: a processor 1001, such as a Central Processing Unit (CPU), a communication bus 1002, a user interface 1003, a network interface 1004, and a memory 1005. Wherein a communication bus 1002 is used to enable connective communication between these components. The user interface 1003 may comprise a Display screen (Display), and the optional user interface 1003 may also comprise a standard wired interface, a wireless interface. The network interface 1004 may optionally include a standard wired interface, a WIreless interface (e.g., a WIreless-FIdelity (WI-FI) interface). The Memory 1005 may be a Random Access Memory (RAM) Memory, or may be a Non-Volatile Memory (NVM), such as a disk Memory. The memory 1005 may alternatively be a storage device separate from the processor 1001.
Those skilled in the art will appreciate that the configuration shown in fig. 1 does not constitute a limitation of the electronic device and may include more or fewer components than those shown, or some components may be combined, or a different arrangement of components.
As shown in fig. 1, a memory 1005, which is a storage medium, may include therein an operating system, a network communication module, a user interface module, and a rotational speed sensor fault diagnosis program.
In the electronic apparatus shown in fig. 1, the network interface 1004 is mainly used for data communication with a network server; the user interface 1003 is mainly used for data interaction with a user; the processor 1001 and the memory 1005 in the electronic device according to the present invention may be provided in the electronic device, and the electronic device calls the rotational speed sensor fault diagnosis program stored in the memory 1005 through the processor 1001 and executes the rotational speed sensor fault diagnosis method according to the embodiment of the present invention.
An embodiment of the present invention provides a method for diagnosing a fault of a rotation speed sensor, and referring to fig. 2, fig. 2 is a schematic flow chart of a first embodiment of a method for diagnosing a fault of a rotation speed sensor according to the present invention. In this embodiment, the method for diagnosing a fault of a rotation speed sensor includes the following steps:
step S100: detecting the rotation speed of an inner input shaft and the rotation speed of an output shaft;
it should be noted that the wet type dual clutch automatic transmission is provided with two clutches which are coaxially nested or arranged in parallel, and has two input shafts which are coaxially and arranged in an inside-outside nested manner, two output shafts which are arranged in parallel, a plurality of synchronizer devices which are arranged on the output shafts, a plurality of shift forks and a differential. The odd-numbered gear input gear and the even-numbered gear input gear of the transmission are respectively arranged on the two input shafts, and through the switching of the two clutches and the action of the corresponding synchronizers, the torque conversion and the output are realized through the corresponding output shafts. Power flow is sequentially transmitted to the transmission input shaft, the double clutches, the transmission output shaft and the wheels through engine torque output.
It should be noted that the inner input shaft rotation speed sensor is used for detecting the inner input shaft rotation speed, and the output shaft rotation speed sensor is used for detecting the output shaft rotation speed. When the internal input shaft rotation speed sensor fluctuates due to the characteristics of the internal input shaft rotation speed sensor, a fault can be misreported. For example, if the inner input shaft rotating speed sensor fails, the rotating speed of the inner input shaft is detected to exceed the threshold value by mistake, and the rotating speed failure is immediately judged, so that false alarm is caused; the inner input shaft speed sensor detects that the inner input shaft speed exceeds a threshold, but the exceeding is not a continuous action, and the inner input shaft speed sensor does not detect a fault, resulting in a functional impact.
Step S200: judging whether the rotating speed of the inner input shaft is greater than a first preset rotating speed or not;
it should be noted that the first preset rotation speed is a threshold value of a fault value and a normal value of the rotation speed of the inner input shaft, and in a specific implementation, the first preset rotation speed is set according to an actual condition of the transmission, and a threshold value for dividing a fault value and a normal value limit can be set as the first preset rotation speed, which is not limited in this embodiment.
Step S300: when the rotating speed of the inner input shaft is greater than a first preset rotating speed, acquiring a correcting rotating speed of the inner input shaft according to the rotating speed of the output shaft, and taking the correcting rotating speed of the inner input shaft as the rotating speed of the current inner input shaft;
it should be noted that when the rotation speed of the inner input shaft is greater than the first preset rotation speed, a fault hidden danger exists in the current rotation speed of the inner input shaft, but at this time, a false alarm of the rotation speed sensor or an actual fault of the rotation speed of the inner input shaft cannot be determined. In order to prevent false alarm, the detected output shaft rotating speed is obtained according to the relation between the inner input shaft rotating speed and the output shaft rotating speed, the inner input shaft correcting rotating speed is used as a substitute value of the current inner input shaft rotating speed, and software corresponding to the clutch is controlled according to the substitute value.
It is easy to understand that the substitute value is smaller than the first preset rotating speed, namely, the substitute value is a normal value, and the substitute value is used as the rotating speed of the inner input shaft, so that the false alarm fault of the inner input shaft sensor can be prevented, the fault solving measure can be immediately executed, and the user experience is reduced.
Step S400: and when the rotating speed of the inner input shaft is continuously greater than the first preset rotating speed and continues for a first diagnosis time, determining that the rotating speed sensor is invalid.
It should be noted that the abnormal rotation speed generally has a continuous process, and when the rotation speed of the inner input shaft is continuously greater than a first preset rotation speed, that is, the rotation speed of the inner input shaft is a fault value, and the time of the fault value is greater than a first diagnosis time, it may be determined that the sensor is out of service. The first diagnosis time is set according to actual conditions in actual implementation, and the first diagnosis time is a threshold value for judging whether the duration of the abnormal rotating speed is normal or a fault.
According to the method, the corrected rotating speed of the inner input shaft is obtained according to the rotating speed of the output shaft, and in the diagnosis stage before the failure of the sensor is judged, the method adopts the substitute value to control the software function, so that the problem that the fault is reported due to abnormal rotating speed signals caused by the instantaneous fluctuation of the characteristics of the rotating speed sensor in the whole vehicle running process can be effectively avoided.
Referring to fig. 3, fig. 3 is a schematic flow chart of a fault diagnosis method for a rotational speed sensor according to a second embodiment of the present invention; based on the first embodiment described above, the rotational speed sensor fault diagnosis method of the present embodiment includes, after the step S300:
step S401: and judging that the rotating speed sensor is invalid when the number of times that the rotating speed of the inner input shaft is greater than the first preset rotating speed is greater than the preset number within second diagnosis time.
The second diagnosis time is smaller than the first diagnosis time. And the duration of some abnormal rotating speed states is short, the rotating speed sensor of the inner input shaft can detect that the rotating speed sensor discontinuously exceeds the first preset rotating speed, but the time of exceeding the first preset rotating speed does not reach the first diagnosis time, and at the moment, the hidden danger that the rotating speed is abnormal and is not judged exists. In order to solve the situation, a preset number is set, and the rotating speed sensor can be determined to be invalid when the number of times that the rotating speed of the inner input shaft exceeds the first preset rotating speed is greater than the preset number in the second diagnosis time. The self characteristic of the rotating speed sensor fluctuates instantaneously, which can cause abnormal rotating speed signals and report faults. The instantaneous abnormality can not affect the function of the whole vehicle, and if the abnormality occurs repeatedly, the function of the whole vehicle is affected, and a fault needs to be reported.
It is easy to understand that, based on the second diagnosis time and the preset times, a third diagnosis time and a second preset times can be set, the third diagnosis time is greater than or equal to the first diagnosis time, and the second preset times is set according to actual conditions. The third diagnosis time may be regarded as a case where the first diagnosis time is exceeded and there is a case where the first preset rotation speed intermittently exceeded in the rotation speed of the input shaft, but the frequency of the intermittent continuation is lower than that in the above-described second diagnosis time, and the third diagnosis time and the second preset number of times may be set in order to make the fault diagnosis more accurate.
It is easy to understand that, based on the first, second and third diagnosis times, a fourth diagnosis time and a fifth diagnosis time may be further set, and in the fifth diagnosis time, if the accumulated time during which the rotation speed of the inner input shaft is greater than the first preset rotation speed is equal to the fourth diagnosis time, it may be determined that the rotation speed sensor is disabled.
Step S500: and controlling the corresponding clutch to be opened so as to enable the vehicle to enter a limp home mode.
It should be noted that, the dual clutch transmission has two clutches, and according to the clutch that the trouble corresponds, open the clutch and enter the limp home mode to avoid the trouble to the harm that the whole car caused and the harm to user's driving experience.
According to the embodiment, different preset time and preset times are set according to different conditions to perform different judgments on the abnormal rotating speed of the inner input shaft, so that the fault is avoided from being mistakenly reported, and the fault diagnosis of the rotating speed sensor is more accurate.
Referring to fig. 4, fig. 4 is a schematic flow chart of a rotational speed sensor fault diagnosis method according to a third embodiment of the present invention; based on the first embodiment, step S100 of the method for diagnosing a fault of a rotational speed sensor in this embodiment specifically includes:
step S101: detecting a working voltage value of an inner input shaft rotating speed sensor, and obtaining the rotating speed of the inner input shaft according to the working voltage value; the output shaft rotation speed is detected.
It should be noted that, the rotation speed of the inner input shaft is acquired according to the working voltage value of the rotation speed sensor of the inner input shaft, so that the acquisition efficiency of the rotation speed of the inner input shaft can be improved, and the acquired rotation speed is more accurate.
Step S300 specifically includes:
step S301: and acquiring the corrected rotating speed of the inner input shaft according to the rotating speed and the transmission ratio of the output shaft, and taking the corrected rotating speed of the inner input shaft as the current rotating speed of the inner input shaft.
It will be readily appreciated that there is a correlation between the speed of the output shaft and the speed of the inner input shaft, which can be deduced by the transmission ratio. And the corrected rotating speed of the inner input shaft is used as the rotating speed of the current inner input shaft, and the clutch is controlled according to the rotating speed of the current inner input shaft.
After the step S101, the method further includes:
step S402: and when the working voltage value is larger than or equal to a first preset voltage value, judging that the rotating speed sensor fails, and controlling the corresponding clutch to be opened so as to enable the vehicle to enter a limp home mode.
It is easy to understand that the first preset voltage is a threshold value of a normal operating voltage value and a fault voltage value of the rotation speed sensor, and when the operating voltage value of the rotation speed sensor is the fault value, it can be directly determined that the rotation speed sensor is out of work. And controlling the clutch to be opened at the moment, so that the vehicle enters a limp home mode.
According to the embodiment, the rotating speed of the inner input shaft is more accurately obtained by detecting the working voltage value of the rotating speed sensor, and meanwhile, the fault diagnosis of the rotating speed sensor is more accurate by directly judging whether the working voltage value of the rotating speed sensor is in a normal value or not.
Referring to fig. 5, fig. 5 is a block diagram showing the structure of the rotational speed sensor failure diagnosis apparatus according to the first embodiment of the present invention.
As shown in fig. 5, a rotational speed sensor fault diagnosis apparatus according to an embodiment of the present invention includes:
the detection module 100: for detecting the speed of the inner input shaft and the speed of the output shaft;
it should be noted that the wet type dual clutch automatic transmission is provided with two clutches which are coaxially nested or arranged in parallel, and has two input shafts which are coaxially and arranged in an inside-outside nested manner, two output shafts which are arranged in parallel, a plurality of synchronizer devices which are arranged on the output shafts, a plurality of shift forks and a differential. The odd-numbered gear input gear and the even-numbered gear input gear of the transmission are respectively arranged on the two input shafts, and through the switching of the two clutches and the action of the corresponding synchronizers, the torque conversion and the output are realized through the corresponding output shafts. Power flow is sequentially transmitted to the transmission input shaft, the double clutches, the transmission output shaft and the wheels through engine torque output.
It should be noted that the inner input shaft rotation speed sensor is used for detecting the inner input shaft rotation speed, and the output shaft rotation speed sensor is used for detecting the output shaft rotation speed. When the internal input shaft rotation speed sensor fluctuates due to the characteristics of the internal input shaft rotation speed sensor, a fault can be misreported. For example, if the inner input shaft rotating speed sensor fails, the rotating speed of the inner input shaft is detected to exceed the threshold value by mistake, and the rotating speed failure is immediately judged, so that false alarm is caused; the inner input shaft speed sensor detects that the inner input shaft speed exceeds a threshold, but the exceeding is not a continuous action, and the inner input shaft speed sensor does not detect a fault, resulting in a functional impact.
The judging module 200: the device is used for judging whether the rotating speed of the inner input shaft is greater than a first preset rotating speed or not;
it should be noted that the first preset rotation speed is a threshold value of a fault value and a normal value of the rotation speed of the inner input shaft, and in a specific implementation, the first preset rotation speed is set according to an actual condition of the transmission, and a threshold value for dividing a fault value and a normal value limit can be set as the first preset rotation speed, which is not limited in this embodiment.
The control module 300: the inner input shaft correcting rotating speed is obtained according to the rotating speed of the output shaft when the rotating speed of the inner input shaft is greater than a first preset rotating speed, and the inner input shaft correcting rotating speed is used as the current rotating speed of the inner input shaft;
it should be noted that when the rotation speed of the inner input shaft is greater than the first preset rotation speed, a fault hidden danger exists in the current rotation speed of the inner input shaft, but at this time, a false alarm of the rotation speed sensor or an actual fault of the rotation speed of the inner input shaft cannot be determined. In order to prevent false alarm, the detected output shaft rotating speed is obtained according to the relation between the inner input shaft rotating speed and the output shaft rotating speed, the inner input shaft correcting rotating speed is used as a substitute value of the current inner input shaft rotating speed, and software corresponding to the clutch is controlled according to the substitute value.
It is easy to understand that the substitute value is smaller than the first preset rotating speed, namely, the substitute value is a normal value, and the substitute value is used as the rotating speed of the inner input shaft, so that the false alarm fault of the inner input shaft sensor can be prevented, the fault solving measure can be immediately executed, and the user experience is reduced.
The diagnostic module 400: and the control unit is further used for judging that the rotating speed sensor is invalid when the rotating speed of the inner input shaft is continuously greater than the first preset rotating speed for a first diagnosis time.
It should be noted that the abnormal rotation speed generally has a continuous process, and when the rotation speed of the inner input shaft is continuously greater than a first preset rotation speed, that is, the rotation speed of the inner input shaft is a fault value, and the time of the fault value is greater than a first diagnosis time, it may be determined that the sensor is out of service. The first diagnosis time is set according to actual conditions in actual implementation, and the first diagnosis time is a threshold value for judging whether the duration of the abnormal rotating speed is normal or a fault.
According to the device, the corrected rotating speed of the inner input shaft is obtained according to the rotating speed of the output shaft, and in the diagnosis stage before the failure of the sensor is judged, the method adopts the substitute value to control the software function, so that the problem that the fault is reported due to abnormal rotating speed signals caused by the instantaneous fluctuation of the characteristics of the rotating speed sensor in the whole vehicle running process can be effectively avoided.
The invention also provides electronic equipment which applies the fault diagnosis method of the rotating speed sensor. Since the electronic device adopts all technical solutions of all the embodiments, at least all the beneficial effects brought by the technical solutions of the embodiments are achieved, and no further description is given here.
The invention also provides a storage medium which applies the fault diagnosis method of the rotating speed sensor. Since the storage medium adopts all technical solutions of all the embodiments, at least all the beneficial effects brought by the technical solutions of the embodiments are achieved, and no further description is given here.
It should be understood that the above is only an example, and the technical solution of the present invention is not limited in any way, and in a specific application, a person skilled in the art may set the technical solution as needed, and the present invention is not limited thereto.
It should be noted that the above-described work flows are only exemplary, and do not limit the scope of the present invention, and in practical applications, a person skilled in the art may select some or all of them to achieve the purpose of the solution of the embodiment according to actual needs, and the present invention is not limited herein.
In addition, the technical details that are not described in detail in this embodiment may be referred to a method for diagnosing a fault of a rotational speed sensor provided in any embodiment of the present invention, and are not described herein again.
Further, it is to be noted that, in this document, the terms "comprises," "comprising," or any other variation thereof, are intended to cover a non-exclusive inclusion, such that a process, method, article, or system that comprises a list of elements does not include only those elements but may include other elements not expressly listed or inherent to such process, method, article, or system. Without further limitation, an element defined by the phrase "comprising an … …" does not exclude the presence of other like elements in a process, method, article, or system that comprises the element.
The above-mentioned serial numbers of the embodiments of the present invention are merely for description and do not represent the merits of the embodiments.
Through the above description of the embodiments, those skilled in the art will clearly understand that the method of the above embodiments can be implemented by software plus a necessary general hardware platform, and certainly can also be implemented by hardware, but in many cases, the former is a better implementation manner. Based on such understanding, the technical solution of the present invention or portions thereof that contribute to the prior art may be embodied in the form of a software product, where the computer software product is stored in a storage medium (e.g. Read Only Memory (ROM)/RAM, magnetic disk, optical disk), and includes several instructions for enabling a terminal device (e.g. a mobile phone, a computer, a server, or a network device) to execute the method according to the embodiments of the present invention.
The above description is only a preferred embodiment of the present invention, and not intended to limit the scope of the present invention, and all modifications of equivalent structures and equivalent processes, which are made by using the contents of the present specification and the accompanying drawings, or directly or indirectly applied to other related technical fields, are included in the scope of the present invention.
Claims (10)
1. A method of diagnosing a malfunction of a rotational speed sensor, the method comprising:
detecting the rotation speed of an inner input shaft and the rotation speed of an output shaft;
judging whether the rotating speed of the inner input shaft is greater than a first preset rotating speed or not;
when the rotating speed of the inner input shaft is greater than a first preset rotating speed, acquiring a correcting rotating speed of the inner input shaft according to the rotating speed of the output shaft, and taking the correcting rotating speed of the inner input shaft as the rotating speed of the current inner input shaft;
and when the rotating speed of the inner input shaft is continuously greater than the first preset rotating speed and continues for a first diagnosis time, determining that the rotating speed sensor is invalid.
2. A method for diagnosing a malfunction of a rotational speed sensor according to claim 1, wherein after the step of obtaining a corrected rotational speed of the inner input shaft based on the rotational speed of the output shaft when the rotational speed of the inner input shaft is greater than a first preset rotational speed, and using the corrected rotational speed of the inner input shaft as the current rotational speed of the inner input shaft, the method further comprises:
and judging that the rotating speed sensor is invalid when the number of times that the rotating speed of the inner input shaft is greater than the first preset rotating speed is greater than the preset number within second diagnosis time.
3. A rotational speed sensor malfunction diagnosis method according to claim 1, characterized in that the second diagnosis time is shorter than the first diagnosis time.
4. A rotational speed sensor malfunction diagnosis method according to any one of claims 1 to 3, characterized in that after the step of determining that the rotational speed sensor is malfunctioning, the method further comprises:
and controlling the corresponding clutch to be opened so as to enable the vehicle to enter a limp home mode.
5. A method for diagnosing a malfunction of a rotational speed sensor according to claim 1, characterized in that the step of detecting the rotational speed of the inner input shaft and the rotational speed of the output shaft specifically includes:
detecting a working voltage value of an inner input shaft rotating speed sensor, and obtaining the rotating speed of the inner input shaft according to the working voltage value;
the output shaft rotation speed is detected.
6. A method for diagnosing a malfunction of a rotational speed sensor according to claim 1, wherein the step of obtaining a corrected rotational speed of the inner input shaft based on the rotational speed of the output shaft and using the corrected rotational speed of the inner input shaft as the current rotational speed of the inner input shaft specifically comprises:
and acquiring the corrected rotating speed of the inner input shaft according to the rotating speed and the transmission ratio of the output shaft, and taking the corrected rotating speed of the inner input shaft as the current rotating speed of the inner input shaft.
7. A rotational speed sensor malfunction diagnosis method according to claim 5, characterized in that after the step of detecting an operating voltage value of an inner input shaft rotational speed sensor and obtaining the inner input shaft rotational speed based on the operating voltage value, the method further comprises:
and when the working voltage value is larger than or equal to a first preset voltage value, judging that the rotating speed sensor fails, and controlling the corresponding clutch to be opened so as to enable the vehicle to enter a limp home mode.
8. A rotational speed sensor failure diagnosis apparatus characterized by comprising:
a detection module: for detecting the speed of the inner input shaft and the speed of the output shaft;
a judging module: the device is used for judging whether the rotating speed of the inner input shaft is greater than a first preset rotating speed or not;
a control module: the inner input shaft correcting rotating speed is obtained according to the rotating speed of the output shaft when the rotating speed of the inner input shaft is greater than a first preset rotating speed, and the inner input shaft correcting rotating speed is used as the current rotating speed of the inner input shaft;
a diagnostic module: and the control unit is further used for judging that the rotating speed sensor is invalid when the rotating speed of the inner input shaft is continuously greater than the first preset rotating speed for a first diagnosis time.
9. An electronic device, characterized in that the device comprises: a memory, a processor, and a speed sensor fault diagnostic program stored on the memory and executable on the processor, the speed sensor fault diagnostic program configured to implement the steps of the speed sensor fault diagnostic method of any one of claims 1 to 7.
10. A storage medium, characterized in that a rotational speed sensor malfunction diagnosis program is stored thereon, which when executed by a processor implements the steps of the rotational speed sensor malfunction diagnosis method according to any one of claims 1 to 7.
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Application publication date: 20200619 |